Khan Aftab Ahmed, Perea-Lowery Leila, Al-Khureif Abdulaziz Abdullah, AlMufareh Nawaf Abdulrahman, Eldwakhly ElZahraa, Säilynoja Eija, Vallittu Pekka Kalevi
Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh 10219, Saudi Arabia.
Department of Biomaterials Science, Institute of Dentistry, University of Turku, FI-20520 Turku, Finland.
Polymers (Basel). 2021 Jan 22;13(3):352. doi: 10.3390/polym13030352.
The research aimed to determine the tensile bond strength (TBS) between polymerized intact and ground fiber-reinforced composite (FRC) surfaces. FRC prepregs (a reinforcing fiber pre-impregnated with a semi-interpenetrating polymer network (semi-IPN) resin system; everStick C&B) were divided into two groups: intact FRCs (with a highly PMMA-enriched surface) and ground FRCs (with a low PMMA gradient). Each FRC group was treated with: StickRESIN and G-Multi PRIMER. These groups were further divided into four subgroups based on the application time of the treatment agents: 0.5, 1, 2, and 5 min. Next, a resin luting cement was applied to the FRC substrates on the top of the photo-polymerized treating agent. Thereafter, weight loss, surface microhardness, and TBS were evaluated. Three-factor analysis of variance ( ≤ 0.05) revealed significant differences in the TBS among the FRC groups. The highest TBS was recorded for the intact FRC surface treated with G-Multi PRIMER for 2 min (13.0 ± 1.2 MPa). The monomers and solvents of G-Multi PRIMER showed a time-dependent relationship between treatment time and TBS. They could diffuse into the FRC surface that has a higher PMMA gradient, further resulting in a high TBS between the FRC and resin luting cement.
该研究旨在测定聚合后的完整和打磨后的纤维增强复合材料（FRC）表面之间的拉伸粘结强度（TBS）。FRC预浸料（一种用半互穿聚合物网络（semi-IPN）树脂体系预浸渍的增强纤维；everStick C&B）分为两组：完整FRC（表面富含聚甲基丙烯酸甲酯（PMMA））和打磨后的FRC（PMMA梯度低）。每个FRC组用StickRESIN和G-Multi PRIMER处理。这些组根据处理剂的应用时间进一步分为四个亚组：0.5、1、2和5分钟。接下来，在光聚合处理剂顶部的FRC基底上施加树脂粘结水门汀。此后，评估重量损失、表面显微硬度和TBS。三因素方差分析（≤0.05）显示FRC组之间的TBS存在显著差异。用G-Multi PRIMER处理2分钟的完整FRC表面记录到最高TBS（13.0±1.2MPa）。G-Multi PRIMER的单体和溶剂在处理时间和TBS之间呈现时间依赖性关系。它们可以扩散到具有较高PMMA梯度的FRC表面，进而导致FRC与树脂粘结水门汀之间具有较高的TBS。
